Jason Euell has added to his development squad by signing up 18-year-old defender Ryan Blumberg.
The Australian centre-back, from Sydney, joins on a one-year deal after spending time with the Nike Academy based at St George's Park and will be part of the Addicks' U23' side for the 2017/18 campaign.
Blumberg becomes the second youngster to arrive from the Nike Academy, following in the footsteps of Dutch midfielder Anfernee Dijksteel.